<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript">
        //==值相同
        //===值和类型都相同
        var a=100
        var b="100"
        console.log(a==b)//true
        console.log(a===b)//false
    </script>
</head>
<body>

</body>
</html>